If I remember in Vegas was the max idle rpm was 1,200. It'd be best to try and idle it up as close as you can to help clean it up. Also leaning out the mixture some as well. Is it just a sniffer? dyno?

1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]